Molding die for balance weights



Oct. 26, 1943. H. J. KALAJIAN MOLDING DIE FOR BALANCE WEIGHTS Filed Jan.30, 1941 \llll qw- Lill fl II II III 25 m Fig-3- F 7. wfgij 'tion butomitting any suitable support for nA-naof Fig. 5, v e

'F-igi 3 isan enlarged elevation of one of the.

Patented Oct. 26, 1943 Harry J. Kalajian, Detroit, Mich., assignor toyHarley C; Loney Company, Detroit, Mich 'a corporation of Michigan a V yApplication .ranua fso, 1941, SerialINo. 376,609! f Claims. ((122-116)"The present invention relatesto die'casting and more particularly to asectional die, particularly adapted for producing spring clip wheelbalancing weights.

Spring clip wheel balancing Weights 1oiI the character comprising aweighted bodyportion and a spring clip about which the body portion ismolded present a manufacturing difficulty in thediificulty of quicklyarranging casting molds in combination with the spring clipsaboutanchoring feet of which the weighted body portions are cast. Accordingto the present invention,,the weighted body portions are "die cast aboutthe anchoringffeet of the spring clip. The die casting is expedited byproviding one ofthe sections of an sectional die with-a plurality. ofpivoted flanges over which the spring clips are sprung. When the springclips are arranged on such flangesfand the. die sectionsare disposedtogether, casting metal is forced into the mold underpressure. The diesections may then be separated and the pivoted flanges swung outwardlywithrespect to their associated sections to per mit removal of thespring clips and the balance weights cast thereon. 1

'Ajnobject of the invention is to provide astructnre by means of which.a plurality of balance weights maybe die cast at the same time.

Another object of the invention is to provide afstructure. wherein aspring clip for balance weights; may be supported with respect to a die.section with anchoring foot portions projecting into molding cavities; i

Still. another object of the invention is; to provide a structurewherein there are facing die secing of spring clips in association withthe die section for the casting of asubsequent group of balance weights;

These and other objects residing in the: ar rangement, combination andconstruction-of the:

parts will beapparentfrom'the following specification when takn with theaccompanying drawn Jnwhich H 1 Fig. 1 is a sideelevation disclosing myinvigfrontdie section; Fig. 2is a section onthe line II'II of Fig. 1, adetail of the section being shownby the line molding cavity formingrecesses in the front die Section, a

Fig. 4. is an enlarged elevation of onetoi'the molding cavity formingrecesses of a 'rear die sectionshowing the spring clip lretainingflange.

association-therewith, I v Fig.5 is an enlarged vertical section throughcooperating front and. rea die section's-showing the manner in whichthespring clip supporting flange projects thefanch oring .foot'oi thespring clip intothe molding cavity;

Fig. 6 discloses a"balanceweight on itsgsupporting flange after it hasbeen cast about the anchoring foot of the spring clip and immediatelyprior tobeing' removed from its flange, I

Fig. 7 is an end elevationo f a s'pring. clip by itself, Q Q

Fig. 8 is aperspectivevview of a finished bal ancing weight cast aboutits spring clip, and j Fig. 9 is a section correspondingjto a portion ofFig. 2 disclosing anotherfeature of the inven- Refer'ring pa ticularlyto the'drawings which disclose die casting apparatus for forming wheel]balancing weightsQbut omit the, molten metal delivery nozzle andassociated structure which may be of any suitable character thereference character I indicates asllppltiglllded jfor slid' ing movementon rods; '2; The su'pport I has connected thereto a base} which areguided by ways 4 rear die sectionsti and 6].; Suitably sup-i portedbyfmeans not shown; with' respect to: the

base 3, but independently thereof is airont plate I in which aresupported front die sections 8' and 9. As shown paricularly in Fig. 2the front? diesections 8 and 9 co actwitlithe; reari die providing apair 10f sections 5 and 6 respectively sectional casting dies. I

The front dies sand 9 areeach provided with a plurality of recessesparticularlyin; dotted outline in Fig.1 and in Figs. 2 an -3.1? opposing the recesses H1 andin theirear dissections 5 and Bare. aplurality of recesses llf Whichfaref shown particularly in Figs. l, 2and 4. Communicating with each of the recesses I l arefrunners l2 whichin turn communicate with run to a sprue opening l4shownparticularlylin'lli l 2. The sprue opening [4 is provided withamolten metal delivery nozzle receiving seat l5 against which the metaldelivery nozzle is urged ina con.- M ventional manner. H As shownparticularly inFigfl, thefrear .die sections 5 and 6 are providedwitntwo groups of". recesses ;l 1. One groupioirecesses ll of each ofthe rear die sections 5 and 6 is in molding cavity forming relation withthe recesses w in the front dies 8 and 9 respectively, while the secondgroup of recesses H in the rear die sections 5 and 6 is disposed at onesid of the front plate l carrying the front die sections 8 and 9.

Each of the recesses I is intersected by a flange receiving recess shownparticularly in Figs. 4, 5 and 6. Within each recess 23 is disposed aflange 2| pivoted about a pin 22. Each flange 2| is provided at theouter end thereof with a portion 23 for receiving a springclip 24. Eachportion 23 is shaped like a wheel rim flange on which the spring clips24 will ultimately be used when they have balance weights cast thereonand have widths equal to those of the spring clips 24.

The spring clips 24 are each provided with an 7 anchoring foot 25,particularly as shown in Figs. 5 and '7, about which its balancingweight is to be cast. When a flange 2| is disposed in its recess 20, aspring clip 24 on the portion 23 thereof is so arranged as to projectthe anchoring foot 25 into the cavity formed by the recesses I 0 and ofthe front and rear die sections respectively; Furthermore, as showninFigs. 5 and 6, the portions 23 for receiving the spring clips 24 areprovided with recesses 25 which are in alignmentwith,

the recesses II with which theyare associated and form continuationsthereof. Y

In operation, with the rear die sections' 5ian'd 6 positioned as shownin Fig. 1, and the support the flanges 2| of the recesses H which havejust i I moved to one side of the front di sections 8 and 9 maybe swungoutwardly, the balance weights 28 cast on the spring clips 24 positionedthereon as shown in Fig. 6 may be removed, and new spring clips 24 maybe positioned on the portions 23 of the flanges 2| for the next castingoperation. The die is then opened by moving the support I and togetherwith it the base 3 and the rear die sections 5 and 6 along the rods 2from cooperating relation with the front die sectiOns 8 and 9. The dieshould be designed in a. conventional manner to cause the sprue to fallaway when'the die is opened. As soon as the die has been opened, therear die sections 5 and 6 are longitudinally moved in oppositedirections to dispose the flanges 2| having the balance weightssupported therefrom laterally of the front die sections 8 and 9 asdescribed and to move the opposite ends of the rear die sections 5 and 6into alignmentwith the front die sections 8 and 9.

In Fig. 9 another feature of the invention is disclosed. The rear diesection 5 is asdisclosed in Figs. 1, 2, 4, 5 and 6. The front diesection 30 corresponds to the front die section 8 and cocarrying with itthe base 3 and the rear die sec- I tions 5 and 6 moved to the left. asviewed. in V Fig. 2 with respect the front diesections Sand 9, to openthe die, the flanges 2| associated with each of the laterally disposedrecesses H are swung outwardly to the position shown in Fig. 6 and thespring clips 24 are assembled thereon. When the spring clips 24 havebeen assembled on the flange 2|, the flanges 2| are swung into theirrecesses 28, thus projecting the anchoring feet 25, as disclosed in Fig.5. The rear die section 5 is then moved to th right'as viewedl in Fig. 1and the rear die section 6 is moved to the left as viewed in Fig.lluntil the portion of the rear die sections 5 and 6 just previously inassociation with'the front the sections dand 9 have been moved to thedotted line positions, as shown in Fig. 1. It will be understood thatsuitabl stops may be provided for limiting the movement of the diesections5 and G ineither direction. 7 With" the rear die sections 5 and6 thus positioned in the recesses I having associated therewith thespring clips 24 .will be in alignment with the recesses ID of the frontdie sections 8 and 9. The die is then closed by moving the support andtogether with it the base 3 and rear die sections 5 and 6 into therelative position with respect to the front die sections 8 and 9 asshown in Fig. 2.

The recesses I8 and willnowbe in cavity formingrelation. It will beobserved from inspection of Fig. 2 that the front plate 1 is providedwith inclined guiding portions 21-.for facilitating the movement of therear die sections 5 and 6 into cooperative relation with the front diesections 8 and 9. W

As soon" as the respective front and rear die sections have been movedtogether to bring the recesses l8 and Il into cavity'forming relation,with'the anchoringfeet 25 of the spring clips 24 projecting into thecavities thus formed, the metal delivery nozzle bearing against the seatI5 I 4 from which the moltenmetal 'is'co'ndu'c'ted operates with therear die section 5 in a base'3 and front plate 1 as above described.

The rear die section 5jis provided with a plurality of cavities H andeach is provided with a pivoted flange 2| for supporting spring clips 24as above described. The front die section 35 is provided with aplurality of recesses 3|, which cooperate with the recesses II toprovide molding cavities. The difference between the structure disclosedin Fig; 9; and that disclosed.

in the other figures of the drawings is the provision of male portions'32 and 33 adjacent the ends of the recesses 3| for filling in the endsof the recesses II and thus for foreshortening the molding cavitiesformed by the recesses may deliver molten metal "tothe spru'e openin and3|. It=is to be understood that by providing a series of front dieportions 38 having male portions 32 and 33 ofdifierent sizes, but allcooperating with the same rear die section 5, there may be providedmolding cavities formed by the recesses H and 3| of different sizes,depending upon the sizes of male portions 32 and 33 on the front diesection 30 which is used. Examples of front die portions 38 forproviding different sized molding cavities areindicated by the dottedoutline in Fig. 9 wherein the dotted outline A represents the outline ofthe recess M of the front die section Sand the dotted outline Brepresents theoutline of a recess 3| for providing an intermediate sizemolding cavity. As shown in the drawing the male portion 33 adjacent thegate l2 may be provided with a channel for extending the gate l2 to theforeshortened molding cavity. 7 r

.From the foregoing specification, it will be apparent that I haveprovided a die casting apparatus for casting wheel balance weights aboutanchoring feet of spring clips therefor.. It will be understood,however, that the invention is not limited to the die casting of balanceweights on spring clips, but may apply to the casting of of objects, itwill be apparent that the invention is equally applicableto the castingof a single object at a time.

Having thus described myinvention, what I I desire to secure by LettersPatent and claim is:

1. A mold for molding a balance weightabout 2,332,856: the anchoringfoot of a spring clip therefor comcavity.

2.UA mold for molding abalance weight about theanchoring foot of aspring clip therefor, comprising two separable parts, said parts havingop-; posed contacting faces,said faces having opposed recesses defininga molding cavity for receiving molten metal to be molded, a flangereceiving recess in the face of one of said parts, said recessintersecting the one of said first named recesses insaid last namedpart, a flange pivoted in said flange receiving recess, said flangehaving a portion having a recess therein in alignment with the recess insaid last named part, said flange being arranged to have sprung oversaid named portion thereof a spring clip having an anchorq means to!admitjmolten fmetal to the molding ing foot, said flange being arrangedso as to project said anchoring foot into said cavity While saidrecesses are in cavity forming relation, said flange also being arrangedto be swingable outwardly upon separation of said parts followingmolding to permit said clip together with the balance weight moldedthereon to be removed therefrom, and means to admit molten metal to themolding cavity.

3. A mold for molding a balance weight about the anchoring foot of aspring clip therefor, com prising two separate parts, said parts havingopposed contacting faces, a flange recessed into one of said faces, saidflange being pivotally supported and swingable outwardly with respect tothe face in which it is recessed, said faces having opposed recessesdefining a molding cavity for receiving molten metal to be molded, saidflange being arranged to receive thereon a spring clip having ananchoring foot, said flange being arranged to project the anchoring footof the spring clip thereon into the cavity defined by said opposedrecesses when said separable parts are disposedto place said recesses incavity forming relation, whereby, said flange, when said separable partsare separated, may be swung outwardly to receive a spring clip and maybe swung inwardly into the face in which it is supported and followingmolding may be swung outwardly to remove the spring clip and balanceweight molded thereon, and means to admit molten metal to the moldingcavity.

4. In a multi-part casting mold, a base, a rear portion axially movablewith respect to said base, a front portion associated with said base, arecess in each of said front and rear portions, said recesses being soarranged as to provide a molding cavity when said rear portion issuitably axially positioned, for receiving molten metal to be cast, saidrear portion being arranged to be moved with respect to said base to oneside of said front portion prior to and subsequent to molding to haveplaced in the recess therein a member about which the molten metal is tobe cast, and to have the casting removed therefrom, respectively, and

i 5.. In a mUlti-part casting mold, a base, .a rear portion axiallymovable with respect to said base, a front portion associated with saidbase, arecess: in-said front and rear portions, said recesses being soarranged as to provide a molding cavity when said rear portion issuitably axially positioned, for receiving molten metal to be cast, a

flange secured to said rear portion over which said recesses are incavity forming, relation, said;

rear portion being arranged to be moved with re-, spect to said base toone side of said front portion prior to and subsequently to moldingtohave secured to said flange the spring clip about the foot of whichmolten metal is to be cast and tohave the casting-removed from saidflange, respectively, and means to admit molten metal to the moldingcavity.

6. In a sectional casting mold, a rear section, a front sectionassociated with said rear section, said front and rear sections havingopposed faces, said sections being arranged so that they are movable ina direction normal to eachother to separate said faces, said faceshaving opposed recesses defining a molding cavity for receiving moltenmetal to be cast, means supported with respect to said rear section forsupporting and projecting into said cavity an insert about which themolten metal is to be cast, said rear section having a lateralprojection, said lateral projection having therein a recess and insertsupporting means duplicating the first named recess and insertsupporting means, said rear section being laterally movable with respectto said front section to place said second named recess and insertsupporting means in said rear section into operative association withthe recess in said front section, whereby while molten metal isbeingcast tion of said casting, and means to admit molten metal to themolding cavity.

7. In a sectional casting mold, a base, a rear section axially slidablein said base, a front section, said sections having opposed faces, saidsections being arranged so that they are movable in a direction normalto each other to separate said faces, a recess in each of said'front andrear sections, said recesses being arranged to provide a molding cavitywhen said rear section is suitably axially positioned for receivingmolten metal to i be cast, said rear section having a laterallyextending portion in which is disposed a recess which is a duplicate ofthe first named recess in said rear section, whereby by axially slidingsaid rear section with respect to said front section either one of saidrecesses in said rear section may be disposed in cavity forming relationwith said recess in said front section, and an insert supporting meansarranged with respect to each of the molding cavities formed by therecesses in said front and rear sections for projecting inserts into themolding cavities, and means to admit molten metal to the moldingcavities.

p 8; The invention as definedinclaim 6 wherein a common sprue opening,whereby the rear sec-- tion may be laterally moved in oppositedirections to permit simultaneous casting, and removal of previouslyformedcastings from the insert supporting means.

9. In a multi-part casting mold, a rear portion, a front portionassociated with said rear portion, a recess in each of said front andrear portions, said recesses being so arranged as to provide a moldingcavity when said front and rear portions are associated together forreceiving molten metal to be cast, said front portion having adjacent atleast one end of the recess thereof, a male member projecting into therecess of said rear portion for foreshortening the efiective length andrendering inoperative the com plement'ary end portion thereof.

10. The method of molding devices of the character described ofdifferent sizes which comprises providing a base die having a recesstherein, and a plurality of auxiliary dies each having a recess thereinof a different size for cooperating with said base die to provide amolding cavity and further providing said auxiliary dies with maleportions at at least'one end of each of their recesses respectively forfilling and rendering inoperative the complementary portion of therecess in the base die not opposing the auxiliary die recess and using adifferent auxiliary die for association with said base die each time adifferent size device of the character described :is to be molded.

HARRY J. KALAJIAN.

